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sim300 hardware design sim300_hd_v3.07 25.10.2007 2 document title: sim300 hardware design version: 3.07 date: 2007-10-25 status: release document control id: sim300_hd_v3.07 general notes simcom offers this information as a service to its customers, to support application and engineering efforts that use the products designed by simcom. the information provided is based upon requirements specifically provided to simcom by the customers. simcom has not undertaken any independent search for add itional relevant information, including any information that may be in the customer?s po ssession. furthermore, system validation of this product designed by simcom within a larger el ectronic system remains the responsibility of the customer or the customer?s system inte grator. all specifications supplied herein are subject to change. copyright this document contains proprietary technical information which is the property of simcom limited., copying of this document and giving it to others and the using or communication of the contents thereof, are forbidden without express authority. offenders are liable to the payment of damages. all rights reserved in the event of grant of a patent or the registration of a utility model or design. all specification supp lied herein are subject to change without notice at any time. copyright ? simcom limited. 2007 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 3 contents contents ............................................................................................................................... .............3 version history ............................................................................................................................... ...7 1 introduction ............................................................................................................................... .....9 1.1 related documents ...............................................................................................................9 1.2 terms and abbreviations .....................................................................................................10 2 sim300 overview .........................................................................................................................13 2.1 sim300 key features ..........................................................................................................14 2.2 sim300 functional diagram ...............................................................................................15 2.3 sim300 evaluation board ...................................................................................................16 3 application interface ....................................................................................................................17 3.1 sim300 pin description ......................................................................................................18 3.2 operating modes ................................................................................................................20 3.3 power supply ......................................................................................................................21 3.3.1 power supply pins on the board-to-board connector ................................................22 3.3.2 minimizing power losses ..........................................................................................23 3.3.3 monitoring power supply .........................................................................................23 3.4 power up and power down scenarios .................................................................................23 3.4.1 turn on sim300 .......................................................................................................23 3.4.2 turn off sim300 ......................................................................................................26 3.4.3 restart sim300 using the pwrkey pin .................................................................28 3.5 power saving ......................................................................................................................29 3.5.1 minimum functionality mode ...................................................................................29 3.5.2 sleep mode (slow clock mode) .................................................................................29 3.5.3 wake up sim300 from sleep mode ......................................................................30 3.6 summary of state transitions (except sleep mode) .........................................................30 3.7 rtc backup ........................................................................................................................30 3.8 serial interfaces ..................................................................................................................34 3.8.1 function of serial port & debug port supporting ......................................................35 3.8.2 software upgrade and software debug ......................................................................36 3.9 audio interfaces .................................................................................................................38 3.9.1 speaker interface configuration ................................................................................39 3.9.2 microphone interfaces configuration ........................................................................40 3.9.3 earphone interface configuration .............................................................................40 3.9.4 referenced electronic characteristic .........................................................................41 3.10 buzzer ..............................................................................................................................4 1 3.11 sim card interface ............................................................................................................42 3.11.1 sim card application ..............................................................................................42 3.11.2 design considerations for sim card holder ............................................................45 3.12 lcd display interface ......................................................................................................47 3.13 keypad interface ..............................................................................................................47 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 4 3.14 adc ............................................................................................................................... ..48 3.15 behaviors of the ri ..........................................................................................................49 3.16 network status indication .................................................................................................50 3.17 general purpose input & output (gpio) ..........................................................................50 4 antenna interface .........................................................................................................................51 4.1 antenna installation ............................................................................................................51 4.1.1 antenna connector ....................................................................................................51 4.1.2 antenna pad ..............................................................................................................51 4.2 module rf output power ...................................................................................................52 4.3 module rf receive sensitivity ............................................................................................52 4.4 module operating frequencies ............................................................................................52 5 electrical, reliability and radio characteristics .............................................................................53 5.1 absolute maximum ratings .................................................................................................53 5.2 operating temperatures ......................................................................................................53 5.3 power supply ratings ..........................................................................................................54 5.4 current consumption ..........................................................................................................55 5.5 electro-static discharge ......................................................................................................56 6 mechanics ............................................................................................................................... .....57 6.1 mechanical dimensions of sim300 ....................................................................................57 6.2 mounting sim300 onto the application platform ...............................................................58 6.3 board-to-board connector ..................................................................................................58 6.3.1 mechanical dimensions of the entery 1008-g60n-01r .....................................59 6.3.2 mechanical dimensions of the jxt 210-106001-001 ...............................................60 6.4 rf adapter cabling .............................................................................................................62 6.5 top view of the sim300 .....................................................................................................64 6.6 pin assignment of board-to-board connector of sim300 ..................................................65 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 5 table index table 1: related documents .....................................................................................................9 table 2: terms and abbreviations .......................................................................................10 table 3: sim300 key features ....................................................................................................14 table 4: coding schemes and maximum net data rates over air interface ..15 table 5: board-to-board connector pin description ...............................................18 table 6: overview of operating modes ..............................................................................20 table 7: at commands used in alarm mode .....................................................................25 table 8: summary of state transitions .............................................................................30 table 9: pin define of the serial interfaces ...................................................................34 table 10: logic levels of the serial port and debug port .....................................34 table 11: pin define of the audio interface ....................................................................38 table 12: mic input characteristics ...................................................................................41 table 13: audio output characteristics ..........................................................................41 table 14: buzzer output characteristics .......................................................................42 table 15: pin define of the sim interface ..........................................................................43 table 16: pin description (a mphenol sim card holder) ............................................45 table 17: pin description (molex sim card holder) ....................................................46 table 18: pin define of the lcd interface .........................................................................47 table 19: pin define of the keypad interface .................................................................47 table 20: adc specification ......................................................................................................48 table 21: behaviours of the ri ................................................................................................49 table 22: working state of the netlight .........................................................................50 table 23: pin define of the gpio interface .......................................................................51 table 24: sim300 conduct ed rf output power .................................................................52 table 25: sim300 conducted rf receive sensitivity .....................................................52 table 26: sim300 operating frequencies ............................................................................52 table 27: absolute maximum ratings .................................................................................53 table 28: sim300 operating temperature ...........................................................................53 table 29: sim300 power supply ratings ...............................................................................54 table 30: sim300 current consumption ..............................................................................55 table 31: the esd endure statue measured table (temperature: 25 , humidity:45% ) .........................................................................................................................56 table 32: connection diagrams ............................................................................................65 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 6 figure index figure 1: sim300 functional diagram .................................................................................16 figure 2: top view of sim300 evb .............................................................................................17 figure 3: reference circu it of the vbat input ..............................................................21 figure 4: reference circuit of the source power supply input ...........................22 figure 5: vbat voltage drop during transmit burst ................................................22 figure 6: turn on sim300 using driving circuit .............................................................24 figure 7: turn on sim300 using button ...............................................................................24 figure 8: timing of turn on system .....................................................................................24 figure 9: timing of turn off system ...................................................................................26 figure 10: timing of restart system ...................................................................................28 figure 11: rtc supply from non-chargeable battery ...............................................31 figure 12: rtc supply from rechargeable battery ....................................................31 figure 13: rtc supply from capacitor ................................................................................31 figure 14: panasonic eecemoe204a charge characteristic ...................................32 figure 15: maxell tc614 charge characteristic ..........................................................33 figure 16: seiko ts621 charge characteristic ...............................................................33 figure 17: connection of the serial interfaces ..........................................................35 figure 18: connection of software upgrade .................................................................36 figure 19: connection of software debug ......................................................................37 figure 20: rs232 le vel converter circuit .........................................................................37 figure 21: speaker interface configuration .................................................................39 figure 22: speaker interface with amplifier configuration ................................39 figure 23: micro phone interface configuration ........................................................40 figure 24: earphone in terface configuration ..............................................................40 figure 25: reference circuit of buzzer ............................................................................42 figure 26: reference circuit of the 8 pins sim card ....................................................44 figure 27: reference circuit of the 6 pins sim card ....................................................44 figure 28: amphenol c707 10m006 512 2 sim card holder ..............................................45 figure 29: molex 91228 sim card holder ............................................................................46 figure 30: reference circuit of the keypad interface .............................................48 figure 31: sim300 services as receiver ................................................................................49 figure 32: sim300 services as caller ....................................................................................49 figure 33: reference circuit of netlight ........................................................................50 figure 34: mechanical dimensions of module unit: mm ....................................57 figure 35: mechanical dimensions of module pcb decal unit: mm ..............58 figure 36: entery 1008-g60n-01r board-to-board connector .................................59 figure 37: jxt 210-106001-001 board-to-board connector ..........................................60 figure 38: board-to-board connector physical photo ...........................................61 figure 39: mm9329-2700b ................................................................................................................62 figure 40: rf connector mxtk ................................................................................................63 figure 41: top view of the sim300 ...........................................................................................64 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 7 version history date version description of change author 2005-04-13 01.00 origin anthony 2005-06-29 01.01 modify the reset pin dc characteristics etc anthony 2005-08-02 01.02 modify the esd characteristics etc anthony 2005-08-23 01.03 delete reset part, update mechanical dimensions, sleep mode and board-to-board connector description anthony 2005-11-02 01.04 add the sim300 current consumption, modify the buzzer pin anthony 2005-11-22 01.05 add the restart timing figure anthony 2005-12-27 01.06 add the software upgrade, the auto-baud and the over temperature power off modify the sleep mode control and the sim card detection anthony 2006-02-22 01.07 modify the figure 3,4,5,20,28 and add the figure 14 anthony 2006-03-16 02.01 modify for sim300_v7.02 add support gprs class 8, modify the vdd_ext level, ?rdy? out by set fixed baudrate, timing of the turn on system anthony 2006-04-04 02.02 modify the function of gpio5 and buzzer pins, the 10k resistance integrated in the vrtc pin. add the description of the autobauding function anthony 2006-05-09 02.03 update temperature range modify the mechanical dimensions of sim300 delete the description of molex connector modify the figure of th e sim reference circuit anthony 2006-6-10 03.01 update the figure of sim card holder anthony 2006-7-27 03.02 add the note about the vrtc pin add the note about the configuration be set and saved as the fix baud rate anthony 2006-8-30 03.03 delete the chapter of antenna gain modify the figure of the timing of turn on system modify the figure of the timing of turn off system modify the high voltage and low voltage of the pwrkey modify the pin name anthony 2006-11-09 03.04 modify the audio output characteristics anthony 2007-01-09 03.05 modify the sim300 key features anthony www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 8 modify the overview of operating modes modify the mic input characteristics modify the buzzer & netli ght reference circuit add the note in the chapte r of the serial interfaces about rts connected to gnd 2007-07-31 03.06 modify the current of vdd_ext to 10ma. modify the autobauding supports baud rate range to 4800-115200bps. add the function of over-voltage automatic shutdown. add the chapter 2.2, the chapter 2.3, the chapter 3.13, the chapter 6.3.2 (add the description of jxt 210-106001-001 connector). add the figure 1, 2, 4, 6, 7, 20, 30, 35, 38 and the table 9, 19. modify the figure 9: timing of turn off system (pulldown time of the pwrkey from 1s-2s to 2s-3s), figure 5, figure 10, and table 20: adc specification. anthony.yang 2007-10-25 03.07 modify the figure 9: timing of turn off system (pulldown time of the pwrkey from 2s-3s to 0.5s-1s) add notes about restricted operation anyong www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 9 1 introduction this document describes the hardware interface of the simcom sim300 module that connects to the specific application and the air interface. as sim300 can be integrated with a wide range of applications, all functional components of sim300 are described in great detail. this document can help you quickly understand sim300 interface specifications, electrical and mechanical details. with the help of this document and other sim300 application notes, user guide, you can use sim300 module to design and set-up mobile applications quickly. 1.1 related documents table 1 : related documents sn document name remark [1] sim300_atc sim300_atc [2] itu-t draft new recommendation v.25ter: serial asynchronous automatic dialing and control [3] gsm 07.07: digital cellular telecommunications (phase 2+); at command set for gsm mobile equipment (me) [4] gsm 07.10: support gsm 07.10 multiplexing protocol [5] gsm 07.05: digital cellular telecommunications (phase 2+); use of data terminal equipment ? data circuit terminating equipment (dte ? dce) interface for shor t message service (sms) and cell broadcast service (cbs) [6] gsm 11.14: digital cellular telecommunications system (phase 2+); specification of the sim applicat ion toolkit for the subscriber identity module ? mobile equipment (sim ? me) interface [7] gsm 11.11: digital cellular telecommunications system (phase 2+); specification of the subscriber identity module ? mobile equipment (sim ? me) interface [8] gsm 03.38: digital cellular telecommunications system (phase 2+); alphabets and language-specific information [9] gsm 11.10 digital cellular telecommunications system (phase 2) mobile station (ms) conformance specification part 1: conformance specification www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 10 1.2 terms and abbreviations table 2 : terms and abbreviations abbreviation description adc analog-to-digital converter arp antenna reference point asic application specific integrated circuit ber bit error rate bts base transceiver station chap challenge handshake authentication protocol cs coding scheme csd circuit switched data cts clear to send dac digital-to-analog converter drx discontinuous reception dsp digital signal processor dte data terminal equipment (typically computer, terminal, printer) dtr data terminal ready dtx discontinuous transmission efr enhanced full rate egsm enhanced gsm emc electromagnetic compatibility esd electrostatic discharge ets european telecommunication standard fcc federal communications commission (u.s.) fdma frequency division multiple access fr full rate gmsk gaussian minimum shift keying gprs general packet radio service gsm global standard for mobile communications hr half rate i/o input/output ic integrated circuit imei international mobile equipment identity inorm normal current imax maximum load current kbps kilo bits per second www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 11 abbreviation description led light emitting diode li-ion lithium-ion mo mobile originated ms mobile station (gsm engine), also referred to as te mt mobile terminated pap password authentication protocol pbcch packet switched broadcast control channel pcb printed circuit board pcs personal communication system, also referred to as gsm 1900 pdu protocol data unit ppp point-to-point protocol rf radio frequency rms root mean square (value) rtc real time clock rx receive direction sim subscriber identification module sms short message service tdma time division multiple access te terminal equipment, also referred to as dte tx transmit direction uart universal asynchronous receiver & transmitter urc unsolicited result code ussd unstructured supplementary service data vswr voltage standing wave ratio vmax maximum voltage value vnorm normal voltage value vmin minimum voltage value vihmax maximum input high level voltage value vihmin minimum input high level voltage value vilmax maximum input low level voltage value vilmin minimum input low level voltage value vimax absolute maximum input voltage value vimin absolute minimum input voltage value vohmax maximum output high level voltage value vohmin minimum output high level voltage value volmax maximum output low level voltage value volmin minimum output low level voltage value www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 12 phonebook abbreviations abbreviation description fd sim fix dialing phonebook ld sim last dialing phonebook (list of numbers most recently dialed) mc mobile equipment list of unansw ered mt calls (missed calls) on sim (or me) own numbers (msisdns) list rc mobile equipment list of received calls sm sim phonebook nc not connect www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 13 2 sim300 overview designed for global market, sim300 is a tri-band gsm/gprs engine that works on frequencies egsm 900 mhz, dcs 1800 mhz and pcs 1900 mhz. sim300 features gprs multi-slot class 10/ class 8 (optional) and supports the gprs coding schemes cs-1, cs-2, cs-3 and cs-4. with a tiny configuration of 40mm x 33mm x 2.85mm , sim300 can fit almost all the space requirements in your applications, such as smart phone, pda phone and other mobile devices. the physical interface to the mobile application is made through a 60-pin board-to-board connector, which provides all hardware interfaces between the module and customers? boards except the rf antenna interface. z the keypad and spi display interface will give you the flexibility to develop customized applications. z serial port and debug port can help you easily develop your applications. z two audio channels include two microphones inputs and two speaker outputs. this can be easily configured by at command. the sim300 provides rf antenna interface with two alternatives: antenna connector and antenna pad. the antenna connector is murata mm9329-2700. and customer?s antenna can be soldered to the antenna pad. the sim300 is designed with power saving tech nique, the current consumption is as low as 2.5ma in sleep mode. the sim300 is integrated with the tcp/ip protocol; extended tcp/ip at commands are developed for customers to use the tcp/ip protocol easily, which is very useful for those data transfer applications. www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 14 2.1 sim300 key features table 3 : sim300 key features feature implementation power supply single supply voltage 3.4v ? 4.5v power saving typical power consumption in sleep mode to 2.5ma ( bs-pa-mfrms=5 ) frequency bands z sim300 tri-band: egsm 900, dcs 1800, pcs 1900. the sim300 can search the 3 frequency bands automatically. the frequency bands also can be set by at command. z compliant to gsm phase 2/2+ gsm class small ms transmit power z class 4 (2w) at egsm 900 z class 1 (1w) at dcs 1800 and pcs 1900 gprs connectivity z gprs multi-slot class 10 default z gprs multi-slot class 8 (option) z gprs mobile station class b temperature range z normal operation: -20c to +55c z restricted operation: -30c to -20c and +55c to +80c (1) z storage temperature -40c to +85c data gprs: csd: z gprs data downlink transfer: max. 85.6 kbps z gprs data uplink transfer: max. 42.8 kbps z coding scheme: cs-1, cs-2, cs-3 and cs-4 z sim300 supports the protocols pap (password authentication protocol) usually used for ppp connections. z the sim300 integrates the tcp/ip protocol. z support packet switched broa dcast control channel (pbcch) z csd transmission rates: 2.4, 4.8, 9.6, 14.4 kbps, non-transparent z unstructured supplementary services data (ussd) support sms z mt, mo, cb, text and pdu mode z sms storage: sim card fax group 3 class 1 sim interface support sim card: 1.8v, 3v external antenna connected via 50 ohm antenna connector or antenna pad audio features speech codec modes: z half rate (ets 06.20) z full rate (ets 06.10) z enhanced full rate (ets 06.50 / 06.60 / 06.80) z echo suppression www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 15 serial port and debug port z serial port: seven lines on serial port interface z serial port can be used for csd fax, gprs service and send at command of controlling module. z serial port can use multiplexing function. z autobauding supports baud rate from 4800 bps to 115200bps. z debug port: two lines on serial port interface /txd and /rxd z debug port only used for debugging phonebook management support phonebook types: sm, fd, ld, rc, on, mc. sim application toolkit support sat class 3, gsm 11.14 release 99 real time clock implemented timer function programmable via at command physical characteristics size: 400.15 x 330.15 x 3.30.3mm (including application connector) 400.15 x 330.15 x 2.850.3mm (excluding application connector) weight: 8g firmware upgrade firmware upgrade by serial port. (1) the sim300 works, but deviations from the gsm specification may error, for example, both the frequency error and the phase error will be large. table 4 : coding schemes and maximum ne t data rates over air interface coding scheme 1 timeslot 2 timeslot 4 timeslot cs-1: 9.05kbps 18.1kbps 36.2kbps cs-2: 13.4kbps 26.8kbps 53.6kbps cs-3: 15.6kbps 31.2kbps 62.4kbps cs-4: 21.4kbps 42.8kbps 85.6kbps 2.2 sim300 functional diagram the following figure shows a functional diagram of the sim300 and illustrates the mainly functional part: z the gsm baseband engine z flash and sram z the gsm radio frequency part z the antenna interface z the board-to-board interface www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design figure 1: sim300 functional diagram 2.3 sim300 evaluation board in order to help you to develop the sim300 application, simcom can supply an evaluation board (evb) that interfaces the sim300 directly with appropriate power supply, sim card, rs232 serial port, handset port, earphone port, antenna and all gpio of the sim300. sim300_hd_v3.07 25.10.2007 16 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 17 figure 2: top view of sim300 evb for details please refer to the sim300-evb_ugd document. 3 application interface sim 300 is equipped with a 60-pin 0.5mm pitch board-to-board connector that connects to the cellular application platform. sub-interfaces in cluded in this board-to-board connector are described in detail in following chapters: z power supply ( please refer to chapter 3.3 ) z serial interfaces (please refer to chapter 3.8 ) z two analog audio interfaces ( please refer to chapter 3.9 ) z sim interface ( please refer to chapter 3.11 ) electrical and mechanical characteristics of the board-to-board connector are specified in chapter 6. there we also include order information for mating connectors. www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 18 3.1 sim300 pin description table 5 : board-to-board connect or pin description power supply pin name i/o description dc characteristics vbat 8 vbat pins of the board-to-board connector are dedicated to connect the supply voltage. the power supply of sim300 has to be a single voltage source of vbat= 3.4v...4.5v. it must be able to provide sufficient current in a transmit burst which typically rises to 2a.mostly, these 8 pins are voltage input vmax= 4.5v vmin=3.4v vnorm=4.0v vrtc i/o current input fo r rtc when the battery is not supplied for the system. current output for backup battery when the main battery is present and the backup battery is in low voltage state. vmax=2.0v vmin=1.2v vnorm=1.8v inorm= 20ua vdd_ext o supply 2.93v voltage for external circuit. by measuring this pin, user can judge whether the system is power on or off. when the voltage is low, the system is power off. otherwise, the system is power on. vmax=3.0v vmin=2.75v vnorm=2.93v imax=10ma gnd digital ground power on or power off pin name i/o description dc characteristics pwrkey i voltage input for power on key. pwrkey get a low level voltage for user to power on or power off the system. the user should keep pressing the key for a moment when power on or power off the system. because the system need margin time assert the software. vilmax=0.2*vbat vihmin=0.6*vbat vimax=vbat audio interfaces pin name i/o description dc characteristics mic1p mic1n i positive and negative voice-band input audio dc characteristics refer to chapter 3.9.4 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 19 mic2p mic2n i auxiliary positive and negative voice-band input spk1p spk1n o positive and negative voice-band output spk2p spk2n o auxiliary positive and negative voice-band output buzzer o buzzer output agnd analog ground general purpose input/output pin name i/o description dc characteristics kbc0~kbc4 o kbr0~kbr4 i keypad interface disp_data i/o disp_clk o disp_cs o disp_d/c o disp_rst o lcd display interface netlight o network status indication gpio0 i/o normal input/output port vilmin=0v vilmax=0.3 *vdd_ext vihmin=0.7*vdd_ext vihmax= vdd_ext+0.3 volmin=gnd volmax=0.2v vohmin= vdd_ext-0.2 vohmax= vdd_ext serial port pin name i/o description dc characteristics dtr i data terminal ready rxd i receive data txd o transmit data rts i request to send cts o clear to send ri o ring indicator dcd o data carrier detection debug port dbg_txd o dbg_rxd i serial interface for debugging and communication vilmin=0v vilmax=0.3*vdd_ext vihmin=0.7*vdd_ext vihmax= vdd_ext+0.3 volmin=gnd volmax=0.2v vohmin= vdd_ext-0.2 vohmax= vdd_ext sim interface pin name i/o description dc characteristics sim_vdd o voltage supply for sim card the voltage can be select by software either 1.8v or 3v sim_data i/o sim data output vilmin=0v www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 20 sim_clk o sim clock sim_presence i sim card detection sim_rst o sim reset vilmax=0.3*sim_vdd vihmin=0.7*sim_vdd vihmax= sim_vdd+0.3 volmin=gnd volmax=0.2v vohmin= sim_vdd-0.2 vohmax= sim_vdd auxadc pin name i/o description dc characteristics adc0 i general purpose analog to digital converter. input voltage value: 0v to 2.4v 3.2 operating modes the table below briefly summarizes the various operating modes referred to in the following chapters. table 6 : overview of operating modes mode function gsm/gprs sleep module will automati cally go into sleep mode if dtr is set to high level and there is no on air and no hardware interrupt (such as gpio interrupt or data on serial port). in this case, the current consumption of module will reduce to the minimal level. during sleep mode, the module can still receive paging message and sms from the system normally. gsm idle software is active. module has registered to the gsm network, and the module is ready to send and receive. gsm talk connection is going on between two subscribers. in this case, the power consumption depends on network settings such as dtx off/on, fr/efr/hr, hopping sequences, antenna. gprs standby module is ready for gprs data transfer, but no data is currently sent or received. in this case, power consumption depends on network settings and gprs configuration. normal operation gprs data there is gprs data in transfer (ppp or tcp or udp). in this case, power consumption is related with network settings (e.g. power control level), uplink / downlink data rates and gprs configuration (e.g. used multi-slot settings). power down normal shutdown by sending the ?at+cpowd=1? command or using the pwrkey. the power management asic disconnects the power supply from the base band part of the module, only the power supply for the rtc is www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design remained. software is not active. the serial port is not accessible. operating voltage (connected to vbat) remains applied. minimum functionality mode (without remove power supply) use the ?at+cfun? command can set the module to a minimum functionality mode without remove the power supply. in this case, the rf part of the module will not work or the sim card will not be accessible, or rf part and sim card will be closed all, the serial port is still accessible. the power consumption in this case is very low. alarm mode rtc alert function launches this restricted operation while the module is in power down mode. sim300 will not be registered to gsm network and only parts of at commands can be available. 3.3 power supply the power supply of sim300 is from a single voltage source of vbat= 3.4v...4.5v. in some case, the ripple in a transmit burst may cause vo ltage drops when current consumption rise to typical peaks of 2a. so the power supply must be able to provide sufficient current up to 2a. for the vbat input, a local bypass capacitor is recommended. a capacitor (about 100 f, low esr) is recommended. multi-layer ceramic ch ip (mlcc) capacitors can provide the best combination of low esr and small size but may not be cost effective. a lower cost choice may be a 100 f tantalum capacitor (low esr) with a sma ll (0.1f to 1f) ceramic in parallel, which is illustrated as following figure. and the capacitors should put as closer as possible to the sim300 vbat pins. the following figure is the recommended circuit. figure 3: reference circuit of the vbat input the circuit design of the power supply depends strongly from the power source where this power is drained. the following figure is the reference design of +5v input source power supply. the designed output for the power supply is 4v, thus a linear regulator can be used. if there?s a big difference between the input source and the desired output (vbat), a switching power supply will be preferable because of its better efficiency especially with the 2a peak current in burst mode of the module. sim300_hd_v3.07 25.10.2007 21 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design the single 3.6v li-ion cell battery type can be connected to the power supply of the sim300 vbat directly. but the ni_cd or ni_mh battery types must be used carefully, since their maximum voltage can rise over the absolute maximum voltage for the module and damage it. figure 4: reference circuit of th e source power supply input the following figure is the vbat voltage ripple wave at the maximum power transmit phase, the test condition is vbat=4.0v, vbat maximum output current =2a, c a =100f tantalum capacitor (esr=0.7 ? ) and c b =1f. b figure 5: vbat voltage drop during transmit burst 3.3.1 power supply pins on th e board-to-board connector eight vbat pins of the board-to-board connector are dedicated to connect the supply voltage; six gnd pins are recommended for grounding. vrtc pin can be used to back up the rtc. sim300_hd_v3.07 25.10.2007 22 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 23 3.3.2 minimizing power losses please pay special attention to the supply power when you are designing y our applications. please make sure that the input voltage will never drop below 3.4v even in a transmit burst during which the current consumption may rise up to 2a. if the power voltage drops below 3.4v, the module may be switched off. the pcb traces from the vbat pins of connector to the power source must be wide enough to ensure no voltage drops occur in the transmit burst mode. 3.3.3 monitoring power supply to monitor the supply voltage, you can use the ?at+cbc? command which include three parameters: voltage percent and voltage value (in mv ). it returns the battery voltage 1-100 percent of capacity and actual value measured at vbat and gnd. the voltage is continuously measured at intervals depending on the operating mode. the displayed voltage (in mv) is averaged over th e last measuring period before the at+cbc command was executed. for details plea se refer to document [1] 3.4 power up and power down scenarios 3.4.1 turn on sim300 sim300 can be turned on by various ways, which are described in following chapters: z via pwrkey pin: starts normal operating mode (please refer to chapter 3.4.1.1) ; z via rtc interrupt: starts alarm modes (please refer to chapter 3.4.1.2) note: the at command must be set after the si m300 is power on and unsolicited result code ?rdy? is received from the serial port. but if the sim300 was set autobauding, the serial port received nothing, the at command can be set afte r 2-3s from the sim300 is power on. you can use at+ipr=x;&w to set a fix baud rate and save the configuration to non-volatile flash memory. after the configuration was saved as fix baud rate, the code ?rdy? should be received from the serial port all the time when the sim300 was power on. please refer to the chapter at+ipr in document [1]. 3.4.1.1 turn on sim300 using the pwrkey pin (power on) you can turn on the sim300 by driving the pwrkey to a low level voltage for period time and then released. the maximum current that can be drained from the pwrkey pin is 0.4ma. the simple circuit illustrates as the following figures. www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design figure 6: turn on sim300 using driving circuit figure 7 : turn on sim300 using button the power on scenarios illustr ates as following figure. figure 8: timing of turn on system sim300_hd_v3.07 25.10.2007 24 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 25 when power on procedure complete, the sim300 will send out following result code to indicate the module is ready to operate when set as fixed baud rate. rdy this result code does not appear when autobauding is active. 3.4.1.2 turn on sim300 using the rtc (alarm mode) alarm mode is a power-on approach by using th e rtc. the alert function of rtc makes the sim300 wake up while the module is power off. in alarm mode, sim300 will not register to gsm network and the software protocol stack is closed. thus the parts of at commands related with sim card and protocol stack will not be accessible, and the others can be used as well as in normal mode. use the at+calarm command to set the alarm time. the rtc remains the alarm time if sim300 was power down by ?at+cpowd=1? or by pwrkey pin. once the alarm time is expired and executed, sim300 goes into the alarm mode. in this case, sim300 will send out an unsolicited result code (urc) when set as fixed baud rate: rdy alarm mode this result code does not appear when autobauding is active. during alarm mode, use at+cfun command to query the status of software protocol stack; it will return 0 which indicates that the protocol st ack is closed. then after 90s, sim300 will power down automatically. however, during alarm mode, if the software protocol is started by at+cfun=1 command, the process of automatic power down will not be available. in alarm mode, driving the pwrkey to a low level voltage for a period will cause sim300 to power down (please refer to the power down scenario). the table follow briefly summarizes the at comm ands that are used usually during alarm mode, for details of the in structions refer to document [1] : table 7 : at commands used in alarm mode at command use at+calarm set alarm time at+cclk set data and time of rtc at + c p o w d power down at+cfun start or close the protocol stack www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 3.4.2 turn off sim300 following procedure can be used to turn off the sim300: z normal power down procedure: turn off sim300 using the pwrkey pin z normal power down procedure: turn off sim300 using at command z over-voltage or under-voltage automatic shutdown: take effect if over-voltage or under-voltage is detected z over-temperature or under-temperature automatic shutdown: take effect if over-temperature or under-temperature is detected 3.4.2.1 turn off sim300 using the pwrkey pin (power down) you can turn off the sim300 by driving the pwrkey to a low level voltage for period time. please refer to the turn on circuit. the power down scenario illustrates as following figure. this procedure will let the module to log off from the network and allow the software to enter into a secure state and save data before co mpletely disconnect the power supply. before the completion of the switching off procedure the module will send out result code: normal power down after this moment, the at commands can?t be executed. the module enters the power down mode, only the rtc is still active. power down can also be indicated by vdd_ext pin, which is a low level voltage in this mode. logout net about 2s to 8s v il <0.2*vbat v ih >0.6*vbat 1s > pulldown >0.5s pwrkey input vdd_ext output figure 9: timing of turn off system 3.4.2.2 turn off sim300 using at command you can use an at command ?at+cpowd=1? to turn off the module. this command will let sim300_hd_v3.07 25.10.2007 26 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 27 the module to log off from the network and allow the module to enter into a secure state and save data before completely disconnect the power supply. before switching off the module will send out result code: normal power down after this moment, the at commands can?t be executed. the module enters the power down mode, only the rtc is still active. power down can also be indicated by vdd_ext pin, which is a low level voltage in this mode. please refer to document [1] for detail about the at command of ?at+cpowd?. 3.4.2.3 over-voltage or under- voltage automatic shutdown the module will constantly monitor the voltage applied on the vbat, if the measured battery voltage 3.5v, the following urc will be presented: under-voltage warnning if the measured battery voltage 4.5v, the following urc will be presented: over-voltage warnning the uncritical voltage range is 3.4v to 4.6v. if the measured temperature 4.6v or 3.4v, the module will be automatic shutdown soon. if the measured battery voltage 3.4v, the following urc will be presented: under-voltage power down if the measured battery voltage 4.6v, the following urc will be presented: over-voltage power down after this moment, no further more at commands can be executed. the module will log off from network and enters power down mode, only the rtc is still active. power down can also be indicated by vdd_ext pin, which is a low level voltage in this mode. 3.4.2.4 over-temperature or under -temperature automatic shutdown the module will constantly monitor the temperatur e of the module, if the measured temperature 80 , the following urc will be presented: +cmte:1 if the measured temperature -30 , the following urc will be presented: +cmte:-1 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design the uncritical temperature range is -35 to 85 . if the measured temperature 85 or -35 , the module will be automatic shutdown soon. if the measured temperature 85 , the following urc will be presented: +cmte:2 if the measured temperature -35 , the following urc will be presented: +cmte:-2 after this moment, the at commands can?t be executed. the module will log off from network and enter power down mode, only the rtc is still active. power down can also be indicated by vdd_ext pin, which is a low level voltage in this mode. to monitor the temperature, you can use the ?at+cmte? command to measure the temperature when the module is power on. for details plea se refer to document [1] 3.4.3 restart sim300 using the pwrkey pin you can restart sim300 by driving the pwrkey to a low level voltage for period time, same as turn on sim300 using the pwrkey pin. before restart the sim300, you need delay at least 500ms from detecting the vdd_ext low level on. the restart scenarios illust rate as the following figure. figure 10: timing of restart system sim300_hd_v3.07 25.10.2007 28 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 29 3.5 power saving there are two methods for the module to enter into low current consumption status. ?at+cfun? is used to set module into minimum functionality mode and dtr hardware interface signal can be used to set system to be sleep mode (or slow clocking mode). 3.5.1 minimum functionality mode minimum functionality mode reduces the functionality of the module to a minimum and, thus, minimizes the current consumption to the lowest level. this mode is set with the ?at+cfun? command which provides the choice of the functionality levels =0 1 4 z 0: minimum functionality; z 1: full functionality (default); z 4: disable phone both transmit and receive rf circuits; if sim300 has been set to minimum functionality by ?at+cfun=0?, the rf function and sim card function will be closed, in this case, the serial port is still accessible, but all at commands correlative with rf function or sim card function will not be accessible. if sim300 has been set by ?at+cfun=4?, the rf function will be closed, the serial port is still active in this case but all at commands correlative with rf function will not be accessible. after sim300 has been set by ?at+cfun=0? or ?at+cfun=4?, it can return to full functionality by ?at+cfun=1?. for detailed information about ?at+cfun?, please refer to document [1] . 3.5.2 sleep mode (slow clock mode) we can control sim300 module to enter or exit the sleep mode in customer applications through dtr signal. when dtr is in high level, there is no on air and hardware interrupt (such as gpio interrupt or data on serial port), sim300 will enter sleep mode automatically. in this mode, sim300 can still receive paging or sms from network but the serial port is not accessible. note: for sim300, it requests to set at command ?at+csclk=1? to enable the sleep mode; the default value is 0, that can? t make the module enter sleep mode , for more details please refer to our at command list. www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 30 3.5.3 wake up sim300 from sleep mode when sim300 is in sleep mode, the following methods can wake up the module. z enable dtr pin to wake up sim300. if dtr pin is pulled down to a low level this signal will wake up sim300 from power saving mode. the serial port will be active after dtr changed to low level about 20ms. z receive a voice or data call from network to wake up sim300. z receive a sms from network to wake up sim300. z rtc alarm expired to wake up sim300. 3.6 summary of state transitions (except sleep mode) table 8 : summary of state transitions further mode current mode power down normal mode alarm mode power down use pwrkey switch on from power down mode by rtc normal mode at+cpowd or use pwrkey pin set alarm by ?at+calarm?, and then switch off the module. when the timer expire, the module turn on and enter alarm mode alarm mode use pwrkey pin or wait module switch off automatically use at+cfun 3.7 rtc backup the rtc (real time clock) power supply of modul e can be provided by an external capacitor or a battery (rechargeable or non-chargeable) throug h the vrtc on the board-to-board connector. there is a 10k resistance has been integrated in sim300 module used for restricting current. you need only a coin-cell battery or a super-cap to vrtc to backup power supply for rtc. note: the vrtc couldn?t be designed to a nc pin in your circuit. you should connect the vrtc pin to a battery or a capacitor. the following figures show various sample circuits for rtc backup. www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design figure 11: rtc supply from non-chargeable battery figure 12: rtc supply from rechargeable battery figure 13: rtc suppl y from capacitor sim300_hd_v3.07 25.10.2007 31 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design z li-battery backup rechargeable lithium coin cells such as the tc614 from maxell, or the ts621 from seiko, are also small in size, but have higher capacity than the double layer capacitors resulting in longer backup times. typical charge curves for each cell type are shown in following figures. note that the rechargeable lithium type coin cells generally come pre-charged from the vendor. figure 14: panasonic eecemoe204a charge characteristic sim300_hd_v3.07 25.10.2007 32 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design figure 15: maxell tc614 charge characteristic figure 16: seiko ts621 charge characteristic note: gold-capacitance backup some suitable coin cells are the electric double layer capacitors available from seiko (xc621), or from panasonic (eecem0e204a). they have a small physical size (6.8mm diameter) and a nominal capacity of 0.2f to 0.3f, giving hours of backup time. sim300_hd_v3.07 25.10.2007 33 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 3.8 serial interfaces table 9: pin define of the serial interfaces name pin function dcd 28 data carrier detection dtr 38 data terminal ready rxd 40 receive data txd 42 transmit data rts 44 request to send cts 46 clear to send serial port ri 48 ring indicator dbg_rxd 47 receive data debug port dbg_txd 49 transmit data sim300 provides two unbalanced asynchronous serial ports. one is the seri al port and another is the debug port. the gsm module is designed as a dce (data communication equipment), following the traditional dce-dte (data terminal equipment) connection, the module and the client (dte) are connected through the following signal (as following figure shows). autobauding supports baud rate from 4800bps to 115200bps. serial port z txd: send data to the rxd signal line of the dte z rxd: receive data from the txd signal line of the dte debug port z dbg_txd: send data to the /rxd signal line of the dte z dbg_rxd: receive data from the /txd signal line of the dte all pins of all serial interfaces have 8ma driver, the logic levels are described in following table table 10 : logic levels of the serial port and debug port parameter min max unit v il 0 0.3*vdd_ext v v ih 0.7 *vdd_ext vdd_ext +0.3 v v ol gnd 0.2 v v oh vdd_ext -0.2 vdd_ext v sim300_hd_v3.07 25.10.2007 34 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design txd rxd rts cts dtr dcd ri dbg_txd dbg_rxd /txd /rxd module (dce) serial port1 serial port debug port serial port2 customer (dte) figure 17: connection of the serial interfaces 3.8.1 function of serial port & debug port supporting serial port z seven lines on serial port. z contains data lines txd and rxd, state lines rts and cts, control lines dtr, dcd and ri. z serial port can be used for csd fax, gprs service and send at command of controlling module. also serial port can be used for multiplexing function. z serial port supports the communication rates as following: 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 default as 115200bps. z autobauding supports baud rates as following: 4800, 9600, 19200, 38400, 57600 and 115200bps. autobauding allows the gsm engine to automatically detect the baud rate configured in the host application. the serial port of the gsm engine supports autobauding for the following baud rates: 4800, 9600, 19200, 38400, 57600, 115200bps. factory setting is autobauding enabled. this gives you the flexibility to put the gsm engine into operation no matter what baud rate your host application is configured to. to take advantage of autobauding mode, specific attention should be paid to the following requirements: synchronization between dte and dce : when dce powers on with the autobauding enabled, it is recommended to wait 2 to 3 seconds before sending the first at character. after receiving the ?ok? response, dte and dce are correctly synchronized. restrictions on au tobauding operation sim300_hd_v3.07 25.10.2007 35 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design z the serial port has to be operated at 8 data bits, no parity and 1 stop bit (factory setting). z the unsolicited result codes like "rdy" , "+cfun: 1" and "+cpin: ready? are not indicated when you start up the me while autobauding is enabled. this is due to the fact that the new baud rate is not detected unless dte and dce are correctly synchronized as described above. note: you can use at+ipr=x;&w to set a fixed baud rate and save the configuration to non-volatile flash memory. after the configuratio n was saved as fix baud rate, the unsolicited result codes like "rdy" should be received from the serial port all the time when the sim300 was power on. debug port z two lines on debug port z only contains data lines /txd and /rxd z debug port only used for debugging. it cannot be used for csd call, fax call. and the debug port can not use multiplexing function. it doesnot support autobauding function. z debug port supports the communication rates as following: 9600, 19200, 38400, 57600, 115200bps 3.8.2 software upgrade and software debug the txd rxd dbg_txd dbg_rxd and gnd must be connected to the io connector when user need to upgrade software and debug software, the txd rxd should be used for software upgrade and the dbg_txd dbg_rxd for software debug. the pwrkey pin is recommended to connect to the io connector. the user al so can add a switch between the pwrkey and the gnd. the pwrkey should be connected to the gnd when sim300 is upgrading software. please refer to the following figures. figure 18: connection of software upgrade sim300_hd_v3.07 25.10.2007 36 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design note: the rts pin must be connected to the gnd in the customer circuit when only the txd and rxd are used in the serial port communication. figure 19: connection of software debug the serial port and the debug port doesn?t support the rs_232 level, it only supports the cmos level. please refer to the table 9 for details about the voltage level. you should add the level converter ic between the dce and dte, if you c onnect it to the computer. please refer to the following figure. figure 20: rs232 level converter circuit sim300_hd_v3.07 25.10.2007 37 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 3.9 audio interfaces table 11 : pin define of the audio interface name pin function mic1p 53 microphone1 input + mic1n 55 microphone1 input - spk1p 54 audio1 output+ (ain1/aout1) spk1n 56 audio1 output- mic2p 57 microphone2 input + mic2n 59 microphone2 input - spk2p 58 audio2 output+ (ain2/aout2) spk2n 60 audio2 output- the module provides two analogy input channels, ain1 and ain2, which may be used for both microphone and line inputs. the electret microphone is recommended when the interface used for microphone. one of the two channels is typically used with a microphone built into a handset. the other channel is typically used with an external microphone or external line input. the module analogy input configuration is determined by control register settings and established using analogy multiplexes. for each channels, you can use at+cmic to set the input gain level of microphone, use at+echo to set the parameters for echo suppression. also, you can use at+sidet to set the side-tone level. for details, please refer to document [1] . it is suggested that you adopt the one of following two matching circuits in order to satisfy speaker effect. the difference audio signals have to be layout according to difference signal layout rules. as show in following figures (note: all components package are 0603.) if you want to adopt a amplifier circuit for audio, we recommend national company?s lm4890. but you can select it according to your needs. sim300_hd_v3.07 25.10.2007 38 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 3.9.1 speaker interface configuration figure 21: speaker interface configuration figure 22: speaker interface wi th amplifier configuration sim300_hd_v3.07 25.10.2007 39 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 3.9.2 microphone interfaces configuration figure 23: microphone interface configuration 3.9.3 earphone interface configuration figure 24: earphone interfa ce configuration sim300_hd_v3.07 25.10.2007 40 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 41 3.9.4 referenced electronic characteristic table 12 : mic input characteristics parameter min typ max unit working voltage 1.2 1.5 2.0 v working current 200 500 ua external microphone load resistance 1.2 2.2 k ohms table 13 : audio output characteristics parameter min typ max unit load resistance 27 32 ohm single ended ref level 0.5477 -12.04 vpp dbm load resistance 27 32 ohm normal output(spk1) differential ref level 1.0954 -6.02 vpp dbm load resistance 27 32 ohm single ended ref level 0.5477 -12.04 vpp dbm load resistance 27 32 ohm auxiliary output(spk2) differential ref level 1.0954 -6.02 vpp dbm 3.10 buzzer the buzzer on the board-to-board connector can be used to driv e a buzzer to indicate incoming call. the output volume of buzzer can be set by ?at+crsl?. the reference circuit for buzzer as shown as following figure: www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design figure 25: reference circuit of buzzer table 14 : buzzer output characteristics parameter min typ max unit working voltage 2.4 2.8 3.3 v working current 2 ma load resistance 1 k ohms 3.11 sim card interface 3.11.1 sim card application you can use at command to get information in sim card. for more information, please refer to document [1] . the sim interface supports the functionality of the gsm phase 1 specification and also supports the functionality of the new gsm phase 2+ specification for fast 64 kbps sim (intended for use with a sim application tool-kit). both 1.8v and 3.0v sim cards are supported. the sim interface is powered from an internal regulator in the module having normal voltage 3v. all pins reset as outputs driving low. logic levels are as described in table sim300_hd_v3.07 25.10.2007 42 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design table 15 : pin define of the sim interface name pin function sim_vdd 19 sim card power output automatic output on sim mode one is 3.0v10%, another is 1.8v10%. current is about 10ma. sim_data 21 sim card data i/o sim_clk 23 sim card clock sim_rst 25 sim card reset sim_presence 16 sim card presence following is the reference circuit about sim interface. we recommend an electro-static discharge device st ( www.st.com ) esda6v1w5 or on semi ( www.onsemi.com ) smf05c for ?esd anti?. the 22 ? resistors showed in the following figure should be added in series on the io line between the module and the sim card for protecting the sim i/o port. the pull up resistor (about 10k ? ) must be added on the sim_data line. note that the sim peripheral circuit should be closed to the sim card socket. the sim_presence pin is used for detecting the sim card removal. you can use the at command ?at+csdt? to set the simcard configure. for detail of this at command, please refer to document [1] : you can select the 8 pins sim card. the reference circuit about 8 pins sim card illustrates as following figure. sim300_hd_v3.07 25.10.2007 43 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 44 figure 26: reference circuit of the 8 pins sim card if you don?t use the sim card detection function, you can let the sim_presence pin nc or connect to the gnd. the reference circuit about 6 pins sim card illustrates as following figure. figure 27: reference circuit of the 6 pins sim card www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 3.11.2 design considerations for sim card holder for 6 pins sim card, we recommend to use amphenol c707 10m006 512 2 .you can visit http://www.amphenol.com for more information about the holder. figure 28: amphenol c707 10m006 512 2 sim card holder table 16 : pin description (amphenol sim card holder) pin signal description c1 sim_vdd sim card power supply, it can identify automatically the sim card power mode one is 3.0v10%, another is 1.8v10%. current is about 10ma. c2 sim_rst sim card reset. c3 sim_clk sim card clock. c5 gnd connect to gnd. c6 vpp not connect. c7 sim_data sim card data i/o. for 8 pins sim card, we recommend to use molex 91228.you can visit http://www.molex.com for more information about the holder. sim300_hd_v3.07 25.10.2007 45 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 46 figure 29: molex 91228 sim card holder table 17 : pin description (mol ex sim card holder) pin signal description c1 sim_vdd sim card power supply, it can identify automatically the sim card power mode one is 3.0v10%, another is 1.8v10%. current is about 10ma. c2 sim_rst sim card reset c3 sim_clk sim card clock c4 gnd connect to gnd c5 gnd connect to gnd c6 vpp not connect c7 sim_data sim card data i/o c8 sim_presence detect sim card presence www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 3.12 lcd display interface sim300 provides a serial lcd display interface that supports serial communication with lcd device. these are composite pins that can be used as gpio ports or lcd display interface according to your application. when used as lcd interface, the following table is the pin definition. lcd interface timing should be united with the lcd device. table 18 : pin define of the lcd interface name pin function disp_data 18 display data output disp_clk 20 display clock for lcd disp_cs 22 display enable disp_d/c 24 display data or command select disp_rst 26 lcd reset 3.13 keypad interface the keypad interface consists of 5 keypad colu mn outputs and 5 keypad row inputs. the basic configuration is 5 keypad columns and 5 keypad rows, giving 25 keys, plus the 5 additional keys (i.e. where a keypad row is pulled low regardless of which column is enabled). table 19 : pin define of the keypad interface name pin function kbc0 27 kbc1 29 kbc2 31 kbc3 33 kbc4 35 keypad matrix column kbr0 37 kbr1 39 kbr2 41 kbr3 43 kbr4 45 keypad matrix row the keypad interface allows a direct external matrix connection. a typical recommend circuit about the keypad is as shown in the following fi gure. the gnd column is added for the additional 5 keys. sim300_hd_v3.07 25.10.2007 47 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design figure 30: reference circuit of the keypad interface 3.14 adc sim300 provides one auxiliary adc (general pur pose analog to digital converter.) as voltage input pin, which can be used to detect the values of some external items such as voltage, temperature etc. we can use at command ?at+cadc? to read the voltage value added on adc0. for detail of this at command, please refer to document [1] . table 20 : adc specification min typ max units voltage range 0 2.4 v adc resolution 16 16 bits adc accuracy* 0.59 mv sampling rate 5 sec adc accuracy*: 12bits. sim300_hd_v3.07 25.10.2007 48 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 3.15 behaviors of the ri table 21 : behaviours of the ri state ri respond standby high voice calling change low, then: 1 change to high when establish calling. 2 use at command ath, the ri pin changes to high. 3 sender hangs up, change to high. data calling change low, then 1 change to high when establish calling. 2 use at command ath, the ri changes to high. sms when receive sms, the ri will change to low and hold low level about 120 ms, then change to high. if the module is used as caller, the ri on the board-to-board connector will maintain high. but when it is used as receiver, following is timing of ring. power on ring mo or mt hang up ring hang on (talking) mo or mt hang up ring ri high low figure 31: sim300 s ervices as receiver figure 32: sim300 services as caller sim300_hd_v3.07 25.10.2007 49 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 3.16 network status indication the netlight on the board-to-board connector can be used to driv e a network status indication led lamp. the working state of this pin is listed in following table: table 22 : working state of the netlight state sim300 function off sim300 is not running 64ms on/ 800ms off sim300 does not find the network 64ms on/ 3000ms off sim300 find the network 64ms on/ 300ms off gprs communication we provide a reference circuit for you, shown as following figure: figure 33: reference circuit of netlight 3.17 general purpose input & output (gpio) sim300 provides a limited number of general purpose input/output signal pin. sim300_hd_v3.07 25.10.2007 50 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design table 23 : pin define of the gpio interface name pin function gpio0 32 general purpose input/output port 4 antenna interface the rf interface has an impedance of 50 ? . to suit the physical design of individual applications sim300 offers two alternatives: z recommended approach: antenna connector on the component side of the pcb z antenna pad and grounding plane placed on the bottom side. to minimize the loss on the rf cable, it need be very careful to choose rf cable. we recommend the insertion loss should be meet following requirement: z gsm900<1db z dcs1800/pcs1900<1.5db 4.1 antenna installation 4.1.1 antenna connector sim300 uses murata?s mm9329-2700 rf connector on the module side, we recommend to use murata?s mxtk92xxxxx as matching connector on the application side. please refer to appendix for detail info about murata?s mxtk92xxxxx. 4.1.2 antenna pad the antenna can be soldered to the pad, or attach ed via contact springs. to help you to ground the antenna, sim300 comes with a grounding pl ane located close to the antenna pad. sim300 material properties: sim300 pcb material: fr4 antenna pad: gold plated pad antenna pad soldering temperature: we recommend 350 . note: the soldering time for antenna pad a nd gnd pad are different, less than 3s for antenna pad and less than 10s for gnd pad. sim300_hd_v3.07 25.10.2007 51 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 52 4.2 module rf output power table 24 : sim300 conducted rf output power frequency max min egsm900 33dbm 2db 5dbm5db dcs1800 30dbm 2db 0dbm5db pcs1900 30dbm 2db 0dbm5db 4.3 module rf receive sensitivity table 25 : sim300 conducted rf receive sensitivity frequency receive sensitivity egsm900 < -106dbm dcs1800 < -106dbm pcs1900 < -106dbm 4.4 module operating frequencies table 26 : sim300 operating frequencies frequency receive transmit egsm900 925 960mhz 880 915mhz dcs1800 1805 1880mhz 1710 1785mhz pcs1900 1930 1990mhz 1850 1910mhz www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 53 5 electrical, reliability and radio characteristics 5.1 absolute maximum ratings absolute maximum rating for power supply and voltage on digital and analog pins of sim300 are list in following table: table 27 : absolute maximum ratings parameter min max unit peak current of power supply 0 4.0 a rms current of power supply (during one tdma- frame) 0 0.7 a voltage at digit pins -0.3 3.3 v voltage at analog pins -0.3 3.0 v voltage at digit/analog pins in power down mode -0.25 0.25 v 5.2 operating temperatures the operating temperature is listed in following table: table 28 : sim300 operating temperature parameter min typ max unit ambient temperature -20 25 55 restricted operation* -30 to -20 55 to 80 storage temperature -40 +85 * sim300 can work, but the deviation fro m the gsm specification may occur. www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 54 5.3 power supply ratings table 29 : sim300 power supply ratings parameter description conditions min typ max unit vbat supply voltage voltage must stay within the min/max values, including voltage drop, ripple, and spikes. 3.4 4.0 4.5 v voltage drop during transmit burst normal condition, power control level for pout max 400 mv voltage ripple normal condition, power control level for pout max @ f<200khz @ f>200khz 50 2 mv p ower down mode sleep mode 35 2.5 ua ma idle mode egsm 900 dcs1800/pcs1900 23 23 ma talk mode egsm 900 dcs1800/pcs1900 260 190 ma data mode, gprs (3 rx,2tx) egsm 900 dcs1800/pcs1900 490 340 ma i vbat average supply current data mode, gprs (4 rx,1tx) egsm 900 dcs1800/pcs1900 290 220 ma peak supply current (during transmission slot every 4.6ms) power control le vel for pout max. 2 3 a www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 55 5.4 current consumption the values for current consumption listed below refer to table 28. table 30 : sim300 current consumption voice call egsm 900 @power level #5 <350ma,typical 260ma @power level #10,typical 130ma @power level #19,typical 86ma dcs 1800/pcs 1900 @power level #0 <300ma,typical 200ma @power level #10,typical 87ma @power level #15,typical 80ma gprs data data mode, gprs ( 1 rx,1 tx ) class 8 egsm 900 @power level #5 <350ma,typical 260ma @power level #10,typical 125ma @power level #19,typical 84ma dcs 1800/pcs 1900 @power level #0 <300ma,typical 200ma @power level #10,typical 83ma @power level #15,typical 76ma data mode, gprs ( 3 rx, 2 tx ) class 10 egsm 900 @power level #5 <550ma,typical 470ma @power level #10,typical 225ma @power level #19,typical 142ma dcs 1800/pcs 1900 @power level #0 <450ma,typical 340ma @power level #10,typical 140ma @power level #15,typical 127ma data mode, gprs ( 4 rx,1 tx ) class 8 egsm 900 @power level #5 <350ma,typical 270ma @power level #10,typical 160ma @power level #19,typical 120ma dcs 1800/pcs 1900 @power level #0 <300ma,typical 220ma @power level #10,typical 120ma @power level #15,typical 113ma class 10 is default set when the module works at data translation mode, the module can also work at class 8 set by at command. www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 56 5.5 electro-static discharge the gsm engine is not protected against electrostatic discharge (esd) in general. therefore, it is subject to esd handing precautions that typical ly apply to esd sensitive components. proper esd handing and packaging procedures must be applied throughout the processing, handing and operation of any application using a sim300 module. the measured values of sim300 ar e shown as the following table: table 31 : the esd endure statue measured tabl e (temperature: 25 , humidity:45% ) part contact discharge air discharge vbat,gnd 4kv 8kv kbr0-4, dtr, rxd, txd, rts, disp_data, disp_clk 2kv 4kv antenna port 2kv 4kv other port 1kv www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 6 mechanics this chapter describes the mechanical dimensions of sim300. 6.1 mechanical dimensions of sim300 following shows the mechanical dimensions of sim300 (top view, side view and bottom view). figure 34: mechanical dimensions of module unit: mm sim300_hd_v3.07 25.10.2007 57 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design figure 35: mechanical dime nsions of module pcb decal unit: mm 6.2 mounting sim300 onto the application platform use the connector entery 1008-g60n-01r or jxt 210-106001-001to fix the sim300 onto the customer platform. 6.3 board-to-board connector we recommend to use entery company?s 1008-g60n-01r or jxt?s 210-106001-001 as the board-to-board connector. they are fully compatible each other. this high density smt connector is designed for parallel pcb-to-pcb applications. it is ideal to use in vcrs, notebook pcs, cordless telephones, mobile phones, audio/visual and other telecommunications equipment where reduced size and weight are important. following is parameter of 1008-g60n-01r and 210-106001-001. for more details, you can login http://www.entery.com.tw or http://www.jxt-china.com for more information. sim300_hd_v3.07 25.10.2007 58 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 6.3.1 mechanical dimensions of the entery 1008-g60n-01r figure 36: entery 1008-g60n-01r board-to-board connector sim300_hd_v3.07 25.10.2007 59 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 6.3.2 mechanical dimensions of the jxt 210-106001-001 figure 37: jxt 210-106001-001 board-to-board connector sim300_hd_v3.07 25.10.2007 60 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design figure 38: board-to-board connector physical photo note the connector entery 1009-g60n-01r or jxt 210-106001-002 is used in socket side (module side) and entery 1008-g60n-01r or jxt 210-100601-001 is used in pin side (user side). sim300_hd_v3.07 25.10.2007 61 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 6.4 rf adapter cabling the rf connector in module side is murata company microwave coaxial connectors mm9329-2700b, it makes a pair with murata company rf connector mxtk. it has high performance with wide frequency range, surface mountable and reflow solderable. following is parameter. certainly you can visit http://www.murata.com/ for more information. figure 39: mm9329-2700b sim300_hd_v3.07 25.10.2007 62 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design figure 40: rf connector mxtk for more information about the connector, please visit http://www.murata.com/ sim300_hd_v3.07 25.10.2007 63 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design 6.5 top view of the sim300 figure 41: top view of the sim300 sim300_hd_v3.07 25.10.2007 64 www.datasheet.co.kr datasheet pdf - http://www..net/
sim300 hardware design sim300_hd_v3.07 25.10.2007 65 6.6 pin assignment of board-to-board connector of sim300 table 32 : connection diagrams pin no. pin name i/o pin no. pin name i/o 1 vbat i 2 vbat i 3 vbat i 4 vbat i 5 vbat i 6 vbat i 7 vbat i 8 vbat i 9 gnd 10 gnd 11 gnd 12 gnd 13 gnd 14 gnd 15 vrtc i/o 16 sim_prese nce i 17 vdd_ext o 18 disp_data i/o 19 sim_vdd o 20 disp_clk o 21 sim_data i/o 22 disp_cs o 23 sim_clk o 24 disp_d/c o 25 sim_rst o 26 disp_rst o 27 kbc0 o 28 dcd o 29 kbc1 o 30 netlight o 31 kbc2 o 32 gpio0 i/o 33 kbc3 o 34 pwrkey i 35 kbc4 o 36 buzzer o 37 kbr0 i 38 dtr i 39 kbr1 i 40 rxd i 41 kbr2 i 42 txd o 43 kbr3 i 44 rts i 45 kbr4 i 46 cts o 47 dbg_rxd i 48 ri o 49 dbg_txd o 50 agnd 51 agnd 52 adc0 i 53 mic1p i 54 spk1p o 55 mic1n i 56 spk1n o 57 mic2p i 58 spk2p o 59 mic2n i 60 spk2n o www.datasheet.co.kr datasheet pdf - http://www..net/
contact us: shanghai simcom ltd. add: sim technology buildi ng, no. 700, yishan road, shanghai, p. r. china 200233 tel: +86 21 5427 8900 fax: +86 21 5427 6035 url: www.sim.com www.datasheet.co.kr datasheet pdf - http://www..net/

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